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Nature Research, Scientific Reports, 1(5), 2015

DOI: 10.1038/srep09183

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Mapping motion of antiferromagnetic interfacial uncompensated magnetic moment in exchange-biased bilayers

Journal article published in 2015 by X. Zhou, L. Ma, Z. Shi, W. J. Fan, R. F. L. Evans, Jian-Guo Zheng, R. W. Chantrell ORCID, S. Mangin ORCID, H. W. Zhang, S. M. Zhou
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

AbstractIn this work, disordered-IrMn3/insulating-Y3Fe5O12 exchange-biased bilayers are studied. The behavior of the net magnetic moment ΔmAFM in the antiferromagnet is directly probed by anomalous and planar Hall effects and anisotropic magnetoresistance. The ΔmAFM is proved to come from the interfacial uncompensated magnetic moment. We demonstrate that the exchange bias and rotational hysteresis loss are induced by partial rotation and irreversible switching of the ΔmAFM. In the athermal training effect, the state of the ΔmAFM cannot be recovered after one cycle of hysteresis loop. This work highlights the fundamental role of the ΔmAFM in the exchange bias and facilitates the manipulation of antiferromagnetic spintronic devices.